Internal-combustion motor



Patented Uct. 9, 19?.

f UNITED STATES HENRY BBIGGS, or HAsBRoUcxHEIGHTs, NEW JERSEY;y

INTERNAL-COMBUSTION MOTOR.

Application filed'k August 12,1927'. Serial No. 212,554.

crank shaft, it having been found-that the cam slot lifting portion of the 'cam block after slight wear, tends to develop a rknock 'which is both annoying and injurious..

In order to overcome this defect ory ob-V jection, the present invention. contemplates an improved connection between the crank shaft and piston rod which compensates for wear and insures a silent andeffective operating engagement between the cam element of the crank shaft and the cam slot block at all times. Y v

The invention further comprehends an i improved adjustable ball and socket connection between the piston and the piston rod by virtue of which lost mot-ion due to wear may be readily taken up and compensationv foriinequalities are allowed for.

Other objects reside in the comparative simplicity of construction of the improvement, the economy with whichr the same may be produced, and the general efficiency derived therefrom. f I

IVith the above recited and otherV objects in view, reference is had tothe following description and accompanying drawings in which there is exhibited one example or embodiment of the invention, while the ap-l pended claims define the actual scope of the invention.

In the drawings-d Figure 1 is a vertical sectional view of the motor constructed in accordance with the invention and illustrating the position of the parts when the piston is at approximately top dead center; v

Fig. 2 is a similar View illustrating the position of the parts when the piston it at approximately bottom dead center;

Fig. 3 is a fragmentary transverse sectional view taken approximately on the line 3-3 of Fig. 2. j

Referring to the drawings lby characters of reference, designates a motor cylinder` and 11 a piston which is mounted therein for PATENT orrlics.;v

reciprocation and which serves to divide vthe l cylinder' into upper and 'lower chambers-12 and 13. Y The upper chamber is provided with an exhaust port 314 and with an intake port- 15, which latter port communicates with soV the lower chamber by a by-pass 16, in which y by-pass is mounted a check valve 17 of any approved. type. Communicating l.with fthe by-pass 16l is a fuel intake or supply Vpipe 18 provided withal check valve 19. rThe upper yand lower ends of the cylinder are closed by cylinder heads 20 and 21,'the latter provided with a stuffing boxtor `packing gland 22, through which a piston rod .23 extends. Atits upper end the piston, rod is connected with the piston 11 by a. ball-and-socket joint, theball 23 being carried by the piston rod andthe socket rod 24 bythe piston.,y An annularscrew plug 25 is threaded yinto the socketfor` adjustment to compensate for wearand take up lost motion of the joint.y

Thel socket-member is splitat 26. and isprovided with apertured ears 27 through which a retaining bolt 28 extends to lock the screw plug 25 in itsy adjusted positions. The cylinder block is provided-with a flange 29vrat y its lower end which is bolted to a crank case 30 throughwhich a crank shaft3l extends. The crank shaft is provided with a crank arm 32 having a spindle 33 eccentric to the crank shaft and upon. whicha camroller 34 is ournaled. The piston rod 23 lhas rigidly securedv to its lower end a cam block 35 which is mounted for vertical reciprocation upon guides 36 in the crank case. The cam lock is provided with a cam slot 37 defining a central arcuate Acurved wall 38 kjoined yby compound curved walls 39 and 40to substantially semi-circular curved end walls 4l and 42, the lower wall 43 of the slot being substantially straight."l The power stroke or down stroke of the piston will maintain the walls 38, 40 and 42 in ,engagement with the cam roller. In order to provide means for taking up wear and maintaining the cam roller in engagement with the walls 41 and 39 on the up stroke, an arm 44 is fulcrumed at 45 to the cam block and isprovided with an arcuate upper surface 46 whichengages with a roller 47 journaled on lthe spindle 33.

A coiled expansion spring 47 is interposed lbetween an outwardly projecting lip 48 on the cam block and the under surface of the arm 44 to impinge the arcuate surface 46 against the roller 47. e

Fromthe foregoingV it will thus be seen 'HIM that an improved `connection between the crank shaft and piston rod of an internal combustion motor of the character set-forth, has been devised which insures a silent and effective operative engagement of the parts at all times.

What isclaimed is:

1. In an internal combustion motor, a cylindera piston movable therein, a crank "shaft," andl a Aconnection between the piston andthe' crankshaft including a. cam slotted block attached to the piston, a cam roller carried by the crank shaft, anda tensioned @means carried by the cam block for maintaining the cam rollerin engagement with the walls ofthe cam slot.

2. In-anf internal combustion motor, a cylindeiyapiston movable therein., a crank shaft, and a connection between the piston vand* the crank shaft including' a cam slotted b'lockfat'tached: to the piston, a cam roller carriedl'by the crank shaft, and a springpressed arm carried by the cam block for 'maintainin'gE the3 cam i roller in engagement with the walls of' the'cam slot. n

3. Inan internal combustion motor, which includesa cylinder, a piston movable therein, Vapistonrodconnected with the piston, a crank' shaft, a cam roller eccentrically `mounted on 'the crank shaft, and a cam slotted `block carried yby the piston, having a wall portion formed concentric with the path of travelof the crank shaft; tensioned means carried by the cam block for lmaintainingthe caml roller in engagement with the camslot wall upon upward movement of the piston.

Y f4. In an' internal combustion motor, which includes a cylinder, a piston movable therein, aspiston rod connected with the piston, a crank shaft, a cam roller eccentrically mounted onthe crank shaft, and a cam slottedblock carried by the piston, having a wall portion formed concentric with the path of travel of the crank shaft; tensioned means carried'by the cam block for maintaining thecamroller `in engagement with the cam slot wall upon upward movement of the piston, said means consisting 1 of a springpressedarm having a convex surface.

5. In an'internal combustion motor, which includes a cylinder, a piston movable therein,

a piston'rod having` an adjustableball-and-` socket connection with the piston, a crank shaft, a caml` roller -eccentrically mounted carriedby the piston, having a wallportion formed concentric with the path of travel of the crank shaft; tensioned means carried 'by the cam block for maintaining the cam roller 55V `on the crank shaft, and a cam slotted block r in engagement with the cam slot wall upon upward movement of the piston.

6. In an internal combustion motor, which includes a-cylinder, av piston movable therein, a pistonrod connected with the piston, a

crank shaft, a cam roller eccentrically mounted yon the crank shaft, and 'a cam slotted block carried by the piston, 1having a wall portion formed concentric with the path of travel of thecrank shaft; tensioned means carried by the cam block for '-maintaining the cam rollerI in engagement with the cam slot wall upon upward movement-of Y the piston, said means consisting of a springpressed arm having a convex surface, anda roller vmounted on'the samel airisy with the cam roller. Y j i 7 In a motor iand in combination with a cam roller on the crank shaft thereof, a1

Signed at New York, in the county ofV New' York and State of New York this 11th day of August, A. D. 1927.

HENRY BRIGGS. 

